Gun Control Background Check Law Explained

Why is there a gun show loop hole in the background check law? Would making the checks "universal" prevent crime and death? Jason Bellini has "The Short Answer."

This transcript has been automatically generated and may not be 100% accurate.

I ... according to recent polls the vast majority of American voters now support universal background checks for people can find out ... what ... wire background checks done on all sales ... the Brady Act requires federally licensed firearms dealers ... background checks on prospective gun for servers use a database called the nationalistic criminal background check system ... but the background check required doesn't apply to people who sell their bonds from private collections often at gun shows ... how many guns are sold by unlicensed parties ... according to data cited by present Obama about forty percent of sales happened without background checks ... but critics say that number is weighted and flawed because it comes from small sample survey nearly two decades ago ... one reason why the statistics are available ... was disclosed the so called gun show loophole ... that's what Pres Obama wants Congress to ... go for most of the estimated three hundred million by the guns in America are registered in any way analysts have recently ... discovered our ... nation ... private sales with the ... house ... those who support background checks on all gun sales argues that so ... gun shows ... would be to work from doing all full transactions ... so it's going to start doing background checks it might help prevent some criminals from buying guns ... but is unlikely to squash the blackboard ... would universal background checks help police track guns found at crime scenes and promised a lot changes to the Pritzker we have no central database they used ... because the Brady bill expressly prohibits the creation of a gun registry ... based on the gun background checks ... Allstate shares in the background check system ... yes members federal law that licensed dealers just ... get some states are using more than others to Kentucky in two thousand twelve to more background checks than any other state ... over two a half million ... California was second with one point three million checks ... that means one Kentucky are buying more guns than anywhere else ... not necessarily ... his numbers are probably inflated because it's just routine checks on anyone holding a concealed weapons ... what are the numbers tell us about how many guns are being sold ... but in two thousand and six to eight point five million background checks ... that number more than double the last decades nearly twenty million in two thousand twelve ... we don't know how good daunting sold in America ... because it's not one background check ... system ... so there's a lot we still don't know about who's buying guns ... at how effective background checks really our ... for us ...